Track a window's class rather than polling it on name changes.
Track a window's class rather than polling it on name changes.

sunaku/wmii,0intro/wmii,0intro/wmii,bwhmather/wmii,sunaku/wmii,0intro/wmii,sunaku/wmii,bwhmather/wmii,bwhmather/wmii,0intro/wmii,sunaku/wmii,bwhmather/wmii,sunaku/wmii,bwhmather/wmii